Users Manual 5

FCC ID: K6620461X50

Users Manual

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FCCID_1770320

Convenience Features FCC ID: K6620461X50 / IC: 511B-20461X50 Rotator Control Functions When using a YAESU model G-800DXA, G-1000DXA, G-2800DXA Antenna Rotator (not supplied), it is possible to control it from the front panel of the FT DX 3000. 1. Press and hold in the [ ENT ] button (one of the [ BAND ] key switches) for one second. The Fre- [3.5(2)], [7(3)] Button [14(5)], [18(6)] Button quency Display area will change over to the “Rotator Control” configuration. 2. Press either the [3.5(2)] button or the [7(3)] button to rotate the antenna. Pressing the [3.5(2)] button will cause rotation to the left (counter-clockwise) by two degree steps, while pressing the [7(3)] button will cause rotation to the right (clockwise) by two degree steps. [ENT] Button 3. Press the [14(5)] button or the [18(6)] button to con- trol the speed of rotation. Pressing the [14(5)] button Counter-clockwise Rotation will cause slower rotation, while pressing the [18(6)] Clockwise Rotation button will speed up rotation. Usually, you will be using the “100%” speed setting. When you are through exercising rotator control, press the [ENT] button momentarily. The Frequency Display will return to the main display field. Speed Down Important Note Speed Up  Set the starting point to match your rotator control indicator needle via the Menu item “014 DISPLAY ROTATOR START UP”. The default setting is zero (north). If your control- ler starting point is south, the Menu item “014 DISPLAY ROTATOR START UP” must be set to “180”. If not set properly the FT DX 3000 display will not show the correct direction.  When the rotator control indicator needle does not indicate the precise antenna direc- tion, calibrate the indicator needle precisely to the antenna direction via the Menu item “015 DISPLAY ROTATOR OFFSET ADJ”. Remove the rubber cap first, and then connect the plug. Page 40 FT DX 3000 Operating Manual

Convenience Features FCC ID: K6620461X50 / IC: 511B-20461X50 More Frequency Navigation Techniques Keyboard Frequency Entry Using the [UP]/[DWN] buttons of the You may enter operating frequencies directly into the supplied MH-31B8 Hand Microphone current VFO, using the front panel [BAND] key buttons. The [UP]/[DWN] buttons on [FST] Button [DWN] Button [UP] Button Example: Enter 14.250.00 MHz the supplied MH-31 B8 Hand 1. P r e s s t h e [ E N T ] b u t - Microphone may also be used ton to engage the direct to manually scan the frequency frequency entry process. upward or downward. Now, beginning with the The microphone’s [UP]/[DWN] first digit of the frequency buttons utilize the tuning steps of (the leftmost digit), we will enter the required digits the Main Tuning Dial knob. of the frequency. When the microphone’s [FST] button 2. Press, in order, the digits of the operating frequency, is pressed, the tuning rate increases using the [BAND] buttons (the frequency entry digit by a factor of ten, in a manner similar or decimal point is printed on the right side of the to the transceiver front panel [FST] buttons). In this example, enter [1.8(1)]  [10(4)]  [GEN(.)]  [3.5(2)]  button. [14(5)]  [50(0)]  [50(0)]  [50(0)]  Advice: [50(0)] You may independently set the tuning steps of the [UP]/ The decimal point after the “MHz” portion of the [DWN] buttons in the AM and FM modes. To set new frequency must be entered, but no decimal point is tuning steps, use Menu items “154 TUNING AM CH required after the “kHz” portion. STEP” and “155 TUNING FM CH STEP”. 3. Press the [ENT] button once more. A short “beep” will confirm that the frequency entry was successful, and the new operating frequency will appear on the display. Advice: If you attempt to enter a frequency outside the oper- ating range of 30 kHz ~ 56 MHz, the microprocessor will ignore the attempt, and you will be returned to your previous operating frequency. If this happens, please try again, taking care not to repeat the error in the frequency entry process. Using the [CLAR/VFO-B] knob You may change the cur- rent VFO frequency in 1 MHz steps. Press the [MHz] button located at the bot- tom and left of the [CLAR/ VFO-B] knob. The 1 MHz steps will be applied to the current VFO frequency. The imbedded LED in the [MHz] button will glow orange in the latter case. When tuning in 1 MHz steps, clockwise rotation of the [CLAR/VFO-B] knob will increase the frequency, while counter-clockwise rotation will decrease the frequency. FT DX 3000 Operating Manual Page 41

Interference Rejection FCC ID: K6620461X50 / IC: 511B-20461X50 Receiver Operation (Front End Block Diagram) The FT DX 3000 includes a wide range of special features to suppress the many types of interference that may be en- countered on the HF bands. However, real world interference conditions are constantly changing, so optimum setting of the controls is somewhat of an art, requiring familiarity with the types of interference and the subtle effects of some of the controls. Therefore, the following information is provided as a general guideline for typical situations, and a starting point for your own experimentation. The FT DX 3000’s interference-fighting circuitry begins in its “RF” stages, and continues throughout the entire receiver section. FT DX 3000 allows configuration of the features described below. R. FLT (IF Roofing Filters) IF NOTCH Three Roofing filters, of 15 kHz, 6 kHz, and 3 kHz The IF Notch filter is a high-Q notch filter that can sig- bandwidths, are provided in the 69 MHz First IF, right nificantly reduce, if not eliminate, an interfering carrier. after the first mixer. These filters are automatically se- lected to provide narrow-band selectivity to protect the DNF (Digital Notch filter) When multiple interfering carriers are encountered dur- following IF and DSP stages. The automatically selected ing reception, the Digital Notch Filter can significantly filter, may be manually changed by the operator, if de- reduce the level of these signals. sired, for special operating circumstances. CONTOUR Filter DNR (Digital Noise Reduction) The DSP’s Digital Noise Reduction (DNR) feature uti- The DSP Contour filter has the unique ability to pro- lizes 15 different mathematical algorithms to analyze vide either a null or a peak in tunable segments of the and suppress different noise profiles encountered on the receiver passband. You may suppress interference and HF/50 MHz bands. Choose the selection that provides excessive frequency components on an incoming signal, the best noise suppression, and allows the signal to rise or you may peak those tunable frequency segments. The up out of the noise. level of the null or peak, and the bandwidth, over which it is applied, are adjustable via the Menu. AGC The AGC system is highly adaptable to changing signal IF SHIFT and fading characteristics, making reception possible The passband center frequency of the IF DSP filter may under the most difficult conditions. be moved up or down by adjusting this control. IF WIDTH The width of the IF DSP filtering may be adjusted using this control. Page 42 FT DX 3000 Operating Manual

Interference Rejection FCC ID: K6620461X50 / IC: 511B-20461X50 ATT When extremely strong local signals or high noise, still degrades reception, you can use the [ATT] button to insert 6, 12, or 18-dB of RF attenuation in front of the RF amplifier. 1. Press the [ATT] button several times to set the de- [ATT] Button Block Diagram Display sired attenuation level, per the chart below. : Attenuator is Off : The incoming signal power is reduced by 6 dB (Signal voltage reduced by 1/2) : The incoming signal power is reduced by 12 dB (Signal voltage reduced to 1/4) : The incoming signal power is reduced by 18 dB (Signal voltage reduced to 1/8th) The selected attenuation level will be indicated in the ATT column of the Block Diagram Display on the display. 2. To restore full signal strength through the Attenua- tor circuit area, press the [ATT] button to restore the ATT display to the “OFF” position. Advice:  The attenuator selection will be memorized independently on each VFO stack of the VFO-A and VFO-B.  If background noise causes the S-meter to deflect on clear frequencies, press the [ATT] button until the S-meter drops to about “S-1”. This setting optimizes the trade-offs between sensitivity, noise, and interference immunity. Also, once you have tuned in a station you want to work, you may want to reduce sensitivity further (add more at- tenuation) by pressing the [ATT] button to a higher setting. This reduces the strength of all signals (and noise) and can make reception more comfortable, important especially during long QSOs. When looking for weak signals on a quiet band, you will want maximum sensitivity, so the IPO should be disabled and the [ATT] button should be set to “OFF.” This situation is typical during quiet times on frequencies above 21 MHz, and when using a small or nega- tive-gain receiving antenna on other bands. FT DX 3000 Operating Manual Page 43

Interference Rejection FCC ID: K6620461X50 / IC: 511B-20461X50 µ-Tune Filter (Requires the optional RF µTuning Kit) The RF µTuning Kit provides ultra-sharp RF selectivity for the front end of the transceiver. Very high Q is made pos- sible by the narrow-band design. Three RF µTuning Kits are available. The MTU-160 covers the 1.8 MHz band. The MTU-80/40 covers the 3.5 and 7 MHz bands. The MTU-30/20 covers 10.1 and 14 MHz bands. When any (or all) of the three optional units are connected, they will be automatically adjusted to center on your operat- ing frequency. The narrow bandwidth is especially useful on the low bands, when many strong signals are being received via NVIS propagation (Near Vertical-Incidence Signals) within a narrow bandwidth. The added protection for the RF stage is es- pecially helpful in preventing IMD and blocking. µ-Tune Operation 1. Press the [MHz/µT] button to activate the µ-Tune filter. The LED inside the [MHz/µT] button glows orange. The [ CLAR/VFO-B ] knob works as the µ-TUNING knob. Advice:  The µ-Tune circuit will automatically align itself onto your operating frequency.  Remember that µ-Tune only operates on the 14 MHz and lower bands. [MHz/µT] Button 2. Rotate the [ CLAR/VFO-B ] knob to peak the re- [CLAR/VFO-B] Button sponse (background noise) or reduce interference. Advice:  You may observe the relative peak point of the µ-Tune filter in the Tuning Offset Indicator on the display, while tuning the [CLAR/VFO-B ] knob.  The amount of change in the center frequency of the µ-Tune filter, when rotating the [CLAR/ VFO-B] knob by one click, can be configured using Menu item “045 GENERAL µTUNE DIAL STEP”.  If you have performed manual adjustment of the Advice: µ-Tune filter center frequency, you may press the  The µ-Tune Filter selection will be memorized in- [CLAR/VFO-B] button to re-center the filter re- dependently on each VFO stack of the VFO-A and sponse on your current operating frequency. VFO-B. 3. Press the [ MHz/µT ] button momentarily to dis-  You may change the indication of the Tuning Offset engage the µ-Tune filter; the “ ” icon will be Indicator to display of the µ-Tune filter continuously changed to “ ” in the FLT column of the Block while the µ-Tune filter is activated. This is Menu Diagram Display on the display. In this mode, only item “011 DISPLAY BAR DISPLAY SELECT”. See the fixed bandpass filter for the current band will be Box on the next page for details of the setting. engaged. Advice: Alternate presses of the [ MHz/µT ] button, will switch the µ-Tune filter between on or off. Page 44 FT DX 3000 Operating Manual


Document Created: 2012-08-10 18:59:20
Document Modified: 2012-08-10 18:59:20
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